cnp3-ebook/exercises/reliability

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8 ../../exercises/reliability.rst:22

	English a `length` field that indicates the length of the data 54/10000 · 54
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	English a Cyclic Redundancy Check (`CRC`) 33/10000 · 33
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	English To speedup the transmission of the frames, a student proposes to compute the CRC over the data part of the frame but not over the header. What do you think of this proposed solution ? 183/10000 · 183
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	English Derive a mathematical expression that provides the `goodput`, i.e. the amount of payload bytes that have been transmitted during a period of time, achieved by the Alternating Bit Protocol assuming that : 203/10000 · 203
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	English Each frame contains `D` bytes of data and `c` bytes of control information 74/10000 · 74
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	English Each acknowledgment contains `c` bytes of control information 61/10000 · 61
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	English The bandwidth of the two directions of the link is set to `B` bits per second 77/10000 · 77
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	English The delay between the two hosts is `s` seconds in both directions 65/10000 · 65
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	English there are no transmission errors 32/10000 · 32
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	English Consider a go-back-n sender and a go-back receiver that are directly connected with a 10 Mbps link that has a propagation delay of 100 milliseconds. Assume that the retransmission timer is set to three seconds. If the window has a length of 4 frames, draw a time-sequence diagram showing the transmission consisting of 10 data frames (each frame contains 10000 bits): 367/10000 · 367
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	English when there are no losses 24/10000 · 24
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	English when the third and seventh frames are lost 42/10000 · 42
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	English when every second acknowledgment is discarded due to transmission errors 72/10000 · 72
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	English Same question when using selective repeat instead of go-back-n. Note that the answer is not necessarily the same. 113/10000 · 113
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	English Practice 8/10000 · 8
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	English Reliable protocols depend on error detection algorithms to detect transmission errors. The following questions will reinforce your understanding of these algorithms. 165/10000 · 165
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	English Reliable protocols rely on different types of checksums to verify whether frames have been affected by transmission errors. The most frequently used checksums are : 164/10000 · 164
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	English the Internet checksum used by UDP, TCP and other Internet protocols which is defined in :rfc:`1071` and implemented in various libraries. 137/10000 · 137
26 ../../exercises/reliability.rst:52

	English the 16 bits or the 32 bits Cyclical Redundancy Checks (CRC) that are often used on disks, in zip archives and in datalink layer protocols. See http://rosettacode.org/wiki/CRC-32 for CRC-32 implementations in various languages. 226/10000 · 226
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	English the Fletcher checksum [Fletcher1982]_, see https://en.wikipedia.org/wiki/Fletcher%27s_checksum for implementation details. 122/10000 · 122

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